RIO DELL, Calif. (AP) — A magnitude-3.8 earthquake has struck in Humboldt County.

The U.S. Geological Survey says the quake struck at 4:02 a.m. Wednesday about 37 miles southwest of Eureka.

A Humboldt County Sheriff’s dispatcher said she had not received any reports of damage or injuries.

(Copyright 2012 by CBS San Francisco. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)